BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	s_name,
	count(*) as numwait
from
	supplier,
	lineitem l1,
	orders,
	nation
where
	s_suppkey = l1.l_suppkey
	and o_orderkey = l1.l_orderkey
	and o_orderstatus = 'F'
	and l1.l_receiptdate > l1.l_commitdate
	and exists (
		select
			*
		from
			lineitem l2
		where
			l2.l_orderkey = l1.l_orderkey
			and l2.l_suppkey <> l1.l_suppkey
	)
	and not exists (
		select
			*
		from
			lineitem l3
		where
			l3.l_orderkey = l1.l_orderkey
			and l3.l_suppkey <> l1.l_suppkey
			and l3.l_receiptdate > l3.l_commitdate
	)
	and s_nationkey = n_nationkey
	and n_name = 'ETHIOPIA'
group by
	s_name
order by
	numwait desc,
	s_name
LIMIT 100;
                                                                                               QUERY PLAN                                                                                               
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Limit  (cost=4804080.98..4804080.99 rows=1 width=26) (actual time=174319.023..174319.047 rows=100 loops=1)
   Buffers: shared hit=10454503 read=953608 written=3142, temp read=161425 written=161419
   ->  Sort  (cost=4804080.98..4804080.99 rows=1 width=26) (actual time=174319.020..174319.029 rows=100 loops=1)
         Sort Key: (count(*)), supplier.s_name
         Sort Method: top-N heapsort  Memory: 32kB
         Buffers: shared hit=10454503 read=953608 written=3142, temp read=161425 written=161419
         ->  HashAggregate  (cost=4804080.96..4804080.97 rows=1 width=26) (actual time=174311.755..174314.504 rows=3945 loops=1)
               Buffers: shared hit=10454495 read=953608 written=3142, temp read=161425 written=161419
               ->  Nested Loop Anti Join  (cost=2654492.88..4804080.96 rows=1 width=26) (actual time=53864.559..174155.791 rows=38912 loops=1)
                     Buffers: shared hit=10454495 read=953608 written=3142, temp read=161425 written=161419
                     ->  Nested Loop  (cost=2654492.88..4804066.06 rows=1 width=34) (actual time=53863.945..153358.924 rows=696601 loops=1)
                           Join Filter: (l1.l_orderkey = orders.o_orderkey)
                           Buffers: shared hit=7367695 read=541174 written=337, temp read=161425 written=161419
                           ->  Hash Semi Join  (cost=2654492.88..4804064.10 rows=1 width=38) (actual time=53863.877..132457.192 rows=1441543 loops=1)
                                 Hash Cond: (l1.l_orderkey = l2.l_orderkey)
                                 Join Filter: (l2.l_suppkey <> l1.l_suppkey)
                                 Rows Removed by Join Filter: 374434
                                 Buffers: shared hit=1703628 read=431182 written=3, temp read=161425 written=161419
                                 ->  Hash Join  (cost=2441.58..1902547.99 rows=800606 width=34) (actual time=20.749..43606.866 rows=1494859 loops=1)
                                       Hash Cond: (l1.l_suppkey = supplier.s_suppkey)
                                       Buffers: shared hit=765103 read=303232
                                       ->  Seq Scan on lineitem l1  (cost=0.00..1817043.50 rows=20015160 width=8) (actual time=0.039..30220.739 rows=37928797 loops=1)
                                             Filter: (l_receiptdate > l_commitdate)
                                             Rows Removed by Filter: 22056532
                                             Buffers: shared hit=763255 read=303220
                                       ->  Hash  (cost=2391.58..2391.58 rows=4000 width=30) (actual time=20.670..20.670 rows=3945 loops=1)
                                             Buckets: 1024  Batches: 1  Memory Usage: 247kB
                                             Buffers: shared hit=1845 read=12
                                             ->  Nested Loop  (cost=79.26..2391.58 rows=4000 width=30) (actual time=1.319..18.818 rows=3945 loops=1)
                                                   Buffers: shared hit=1845 read=12
                                                   ->  Seq Scan on nation  (cost=0.00..1.31 rows=1 width=4) (actual time=0.006..0.012 rows=1 loops=1)
                                                         Filter: (n_name = 'ETHIOPIA'::bpchar)
                                                         Rows Removed by Filter: 24
                                                         Buffers: shared hit=1
                                                   ->  Bitmap Heap Scan on supplier  (cost=79.26..2350.26 rows=4000 width=34) (actual time=1.306..17.660 rows=3945 loops=1)
                                                         Recheck Cond: (s_nationkey = nation.n_nationkey)
                                                         Buffers: shared hit=1844 read=12
                                                         ->  Bitmap Index Scan on supplier_s_nationkey_s_suppkey_idx  (cost=0.00..78.26 rows=4000 width=0) (actual time=0.986..0.986 rows=3945 loops=1)
                                                               Index Cond: (s_nationkey = nation.n_nationkey)
                                                               Buffers: shared hit=2 read=12
                                 ->  Hash  (cost=1666929.80..1666929.80 rows=60045480 width=8) (actual time=53813.976..53813.976 rows=59985329 loops=1)
                                       Buckets: 4194304  Batches: 4  Memory Usage: 586039kB
                                       Buffers: shared hit=938525 read=127950 written=3, temp written=153747
                                       ->  Seq Scan on lineitem l2  (cost=0.00..1666929.80 rows=60045480 width=8) (actual time=0.098..25989.156 rows=59985329 loops=1)
                                             Buffers: shared hit=938525 read=127950 written=3
                           ->  Index Scan using pk_orders on orders  (cost=0.00..1.94 rows=1 width=4) (actual time=0.013..0.013 rows=0 loops=1441543)
                                 Index Cond: (o_orderkey = l2.l_orderkey)
                                 Filter: (o_orderstatus = 'F'::bpchar)
                                 Rows Removed by Filter: 1
                                 Buffers: shared hit=5664067 read=109992 written=334
                     ->  Index Scan using lineitem_l_orderkey_idx on lineitem l3  (cost=0.00..7.42 rows=5 width=8) (actual time=0.029..0.029 rows=1 loops=696601)
                           Index Cond: (l_orderkey = l1.l_orderkey)
                           Filter: ((l_receiptdate > l_commitdate) AND (l_suppkey <> l1.l_suppkey))
                           Rows Removed by Filter: 1
                           Buffers: shared hit=3086800 read=412434 written=2805
 Total runtime: 174322.769 ms
(56 rows)

COMMIT;
COMMIT